List two disputes that can arise in the context of message authentication
Data is prone to various attacks. One of these attacks includes message authentication. This threat arises when the user does not have any information about the originator of the message. Message authentication can be achieved using cryptographic methods which further make use of keys.
Message Authentication Functions:
All message authentication and digital signature mechanisms are based on two functionality levels:
These message authentication functions are divided into three classes:
Read more about symmetric encryption here.
Measures to deal with these attacks:
Each of the above attacks has to be dealt with differently.
Another ultimate solution for all kinds of message authentication is Message Authentication Code (MAC).
What is the dispute of message authentication?
Message authentication is concerned with: protecting the integrity. of a message, validating identity of originator and non-repudiation of. origin (dispute resolution).
What types of attacks are addressed by message authentication?
Encryption protects against passive attack (eavesdropping). A different requirement is to protect against active attack (falsification of data and transactions). Protection against such attacks is known as message authentication.
What are the three types of message authentication methods?
Message authentication is typically achieved by using message authentication codes (MACs), authenticated encryption (AE) or digital signatures.
How many types of message authentication functions are there?
There are four types of MACs: unconditionally secure, hash function-based, stream cipher-based and block cipher-based In the past, the most common approach to creating a MAC was to use block ciphers like Data Encryption Standard (DES), but hash-based MACs (HMACs) which use a secret key in conjunction with a ...